Monterey Square is a public park and historical landmark in Savannah. It was laid out in 1847 and named in honor of the 1846 Battle of Monterey during the Mexican-American War. The square is known for its beautiful fountain, which was added in 1989, and for its historic monuments and buildings. One of the most notable buildings on the square is the Mercer-Williams House, made famous in the book and movie "Midnight in the Garden of Good and Evil."